Question

the ventricle in a single-loop circulatory system is responsible for
A. receiving blood from the body
B. pumping blood out of the gills
C. pumping blood out to the body
D. receiving blood from the gills

Answer 1

a according to ur pic

Answer 2

Thank you =) could you help me with more?

Answer 3

ok

Answer 4

what step is occurring in step 1?
A. fertiliazation
B. formation of a zygote
C. ovulation
D. formation of a blastocyst

Answer 5

ovulation

Answer 6

4a5b7implantation

Answer 7

That was the only one I needed for that pic. I have one more pic, can you see if you know it?

Answer 8

next q?

Answer 9

What type of immune response is shown?

Answer 10

cytotoxic t cell mediated

Answer 11

Every time you get a virus infection, say influenza (flu), the virus invades certain cells of your body (in this case cells of the respiratory passages). Once inside, the virus subverts the metabolism of the cell to make more virus. This involves synthesizing a number of different macromolecules encoded by the viral genome.

In due course, these are assembled into a fresh crop of virus particles that leave the cell (often killing it in the process) and spread to new target cells.

Except while in transit from their old homes to their new, the viruses work inside of your cells safe from any antibodies that might be present in blood, lymph, and secretions.

But early in the process, infected cells display fragments of the viral proteins in their surface class I molecules. CTLs specific for that antigen will be able to bind to the infected cell and often will be able to destroy it before it can release a fresh crop of viruses.

In general, the role of the CD8+ T cells is to monitor all the cells of the body, ready to destroy any that express foreign antigen fragments in their class I molecules.

Answer 12

also called cell mediated immunity

Answer 13

b http://highered.mcgraw-hill.com/sites/0072507470/student_view0/chapter22/animation__the_immune_response.html

Answer 14

Thank you so much

Answer 15

wait, so its cell-mediated response or humoral response?

Answer 16

cell mediated ......
humoral means antibody production and killing by antibodies

Answer 17

oh I see, thank you